Morphology and mechanical properties of electrospun poly(butylene succinate) ultrafine fibrous membranes

Poly(butylene succinate)(PBS) ultrafine fibrous membranes were prepared by electrospinning of PBS solutions with different mass concentrations.The morphology of ultrafine fibrous membranes was observed by field-emission scanning electron microscopy(FE-SEM).The ultrafine fibrous membranes with mass concentration of 6% and cast membranes with mass concentration of 6% were examined by FT-IR,XRD and DSC.Analytical comparison of their structures and mechanical properties was made.The results showed that the average diameters of ultrafine fibers increase from 195 nm to 389 nm with increasing of PBS mass concentration.Compared with cast membranes,the crystallinity of ultrafine fibrous membranes decreases.Its failure stress is 18.6 MPa and lower than cast membranes,but failure strain is up to 120%,almost twice as much as that of cast membranes.